@media screen and (min-width:1200px) {
  html {
    font-size: 20px;
  }
}

@media screen and (min-width:800px) and (max-width:1200px) {
  html {
    font-size: 16px;
  }
}

@media screen and (max-width:800px) {
  html {
    font-size: 12px;
  }
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}


h2 {
  text-align: center;
  height: 3rem;
  text-align: center;
  line-height: 3rem;
}

div {
  width: 20rem;
  height: 28rem;
  margin: 0.5rem auto;
  padding: 1rem;
  background-color: #495678;
  border: 0.1rem solid black;
  border-radius: 1rem;
}

ul {
  list-style: none;
  width: 18rem;
  height: 28rem;
}

ul li {
  width: 18rem;
  height: 4.5rem;
  margin: 0.5rem 0;
}

ul input {
  float: left;
  margin-top: 0.9rem;
  width: 12rem;
  height: 2.5rem;
  padding-right: 1.5rem;
  background-color: #98D1DC;
  border-style: inherit;
  border-radius: 1rem;
  text-align: right;
  line-height: 2.5rem;
  color: white;
  font-size: 20px;
}

ul li span,
ul li button {
  display: block;
  float: left;
  width: 3.2rem;
  height: 3.2rem;
  margin: 0.6rem;
  border-radius: 50%;
  background-color: #72778B;
  text-align: center;
  line-height: 3rem;
  color: white;
  height: 3rem;
  font-size: 1.2rem;
  cursor: pointer;
  border: none;
}